Chapter 79 - Lateral and Medial Epicondylitis Flashcards
pathomechanics in lateral epicondylitis
eccentric contraction of the ECRB during a backhand swing
primary muscle involved in lateral epicondylitis
ecrb (PIN)
relationship of the ECRB at the lateral epicondyle?
ECRB and EDC tendinous origins lie DEEP to the musclar ECRL origin
ECRB/EDC lie superficial to the LCL and the supinator
histology of Lateral epicondylitis
angiofibroblastic hyperplasia
- neovascularization
- infiltration of mucopolysaccharide
- disorganized collagen scaffolding
- bone formation
- angiofibroblastic proliferation
diagnostic exam finding in posterolateral plica
pain and popping with flexion and extension of the elbow in pronation
outcomes of CSI for lateral epicondylitis
good for short term outcomes, no improvement longterm with trend toward poorer outcomes
outcomes of open vs arthroscopic debridement of the lateral epicondyle
RCT shows no difference
muscles most commonly involved in medial epicondylitis
pronator teres, FCR
relationship of the anterior band of the ucl to the flexor pronator mass
anterior band of the ulnar collateral ligament is deep to the fcr and the pronator teres
anterior band of the ucl is the primary restraint to valgus force at the elbow
histopathology of medial epicondylitis
same as lateral epicondylitis:
angiofibroblastic hyperplasia
where is the point of maximal tenderness in medial epicondylitis
just anterior and distal to the medial epicondyle
XR findings that suggest valgus extension overload rather than medial epicondylitis
posteromedial osteophytes and joint space narrowing
what nerve is at risk with open management of medial epicondylitis
MABC
how does concomitant ulnar neuritis preop affect surgical outcomes in medial epicondylitis debridement?
poorer outcomes
